Magnetic decomposing and reassembling television system



March 19, 1940. J, MURRAY 2,194,094

MAGNETIC DECOMPOSING AND REASSEMBLING TELEVISION SYSTEM Filed Aug. 18,1936 'F1a l- 2279* 8O* il E. 7M 80.5 25 2J a@ mf* 116/9 11E 17 2l 25 28%2g 29 Q63 19 23 28" @3H/l U84* asafm aa-B am 51 l 52 s 85 f6 41 42.

7T 74. A 34 a8 O43 44 4a 5o 5a 5J; 56 5@ 61 5a 44 BJ 53 Si as 4LPatented Mar. 19, 1940 UNITED STATES; PATENT*orticaff.;fr

2,194,094 livrlilofmrrio DE'o'oMPos'ING ANDREAS- SEMBLING TELEVISION`SYSTEM Howard J. l\urray, New York, N. Y.: Applicationnugnst 1s, 1936,'serial no. 96,573

5 One of the objects of my invention is to pro-v pressed on the vsaid.,grids whereby elementary,l 5 vide a device with stationary partsarranged tol portions of a beam offplane polarizedlight will .causeelementary portions of light flux and bepogressivelyand sequentiallyanalyzed bythe groups of elementary'portions of magnetiefiux planerotating actions of .the said fields when to become co-operativelyassociated' to thereby traversing in afdielectricg-uz`ipath, andai; an

' control the transfer of subject matter character#` analyzing speeddetermined by the number I'0fA 10 f isticsof images from one place toanother. j reversing elementary analyzingrlelolsfproduced Another objectof my invention is to provide by thesaid 601111110130! IlelWOTkIldlllfleqlleicf v means whereby subject matter characteristics of of thescanningcurrent. t j f images will be usefully transferred from [one -Inthe following description names willbegiven" l5 place to another placeby sequentiallyanalyzed to partsI for convenience of expression, .butthelr elementary portions of a beam of plane polarized names 'areintended to be as 4g'eneric'in their ap-` light during the reversal andneutralization of plications to similar partsas their art will permit`.,j

adjacent elementary magnetic flux iields to form T he invention allowsnumerous physical ern-1- a resultant iield in a common `iiux path."bodimen'ts and vone type' is herein illustrated for y Q0 Still anotherobject of my invention is to`p'1j'o-' the-purpose or showing anapplicationof my in `20 n vide means whereby subject mattercharactervention, but'it is understood ltlnatther showingsl istics ofrimages in the iorrnof trains of light enin the [drawing are largely clia'grammaticmerely` l ergy will4 be associated with scanningltrairisof4 being suiicient in-detail toshowanf application magneticenergy to thereby cofoperate therewith of the invention. "L, l

to cause the transfer of the said image ,chararw` The present disclosureisaLdeveIOprnent orr the .f teristics from one place to another place.invention described' in myv cci-pending" applica- J f A further objectoffmy invention is to prot/'idey tion Serial No; 89,487 filed July.8`,y1936. a circuit organization element constituting;'a In application No.189,487 ,separate horizontal magnetic light decomposingcelland'arranged and vertical conductor g'rid's` were employed toymagnetically to sequentially and progressively producereversingelementaryv magnetic iields in '30k decompose a beam of normalplane polarized Il ux paths provided bya' dielectric in the pathof"light into a plurality of elementary portionsjeach plane polarizedlightf r However, according to with` the said Anormal plane polarizationvat the `,application Ser. No,v 39,487," each `i/'er1', i'ca lgridlinstant of deconlposltion and in accordance with" network requiredvaVertical scanning current-,of

5 the characteristics of a single scanningcurrentl aqcertain frequency,andeach horizontalgridre- 35I An additional object of my invention is toproquired a ,horizontal scanning' current' of a diijler. videme'ansWherebya beam of light may be magent frequency.. In addition, thellighttvalvefacfr netically separated in a progressive sequential Itionrequired two verticalnetworks and'ahort, manner into a plurality ofelementary"portionsl zontal network. l

periodically repeated as a function of thef re According to' thepresent'disclosure,; only one 4' 'quency of the said scanning current.lrietwork" grid cell "and 'one (scanning'currentarev v A stilladditional object of thepresent en required. The one required: scanning`current tion is to provide a circuit element eelt-arranged maybe oflcommercial frequency no W'"produced` t0 magnetically, sequentially andDTO'gIGSSi'VGIY in accurateregularity required'for the operation 4 5rotate the universal plane polarization'- vof ele'-,l of time4indicating'circuit elements, and' thus th 451, mentary portions of abeam of plane polarized scanning current will lloe' at'v once ,availablein light through parallel planes. many places.` l H A still furtherobject of my invention is to pro- Inythe'drawing: f vide means includinga conductor meshnetwork "'ure l is Va side elevation view ofthe arformed by a plurality of grid portions immersed rangement of elementsincluding a light decom- 50" in a dielectric magnetically affected atelemenposing .circuit cell constituting a portion ofa tary portionsbyiields createdby subject matter, television transmitting stationorganization. characteristic current to thereby act to.'consti' Figur-e2is aside elevation View of the artute a light valve. f rangement ofelements including a lighty valve The inventionalso contemplates theemploys ,colata-t.v (C1. ris-6) i A general object of my invention is toprovide a light decomposing and reassembling .device Whlch may be usedto transmit and receive subject matter characteristics of images.

ment of a conductor `mesh networkincluding a pluralitylof mesh gridportions ,relatively positioned so {as to produce; elementary magneticfields in accordance. with.l trains of currentgim` .and'lightre-'assembling circuit cell constituting iield vfluxrelationsindicatedbythe arrowsf'to ducing current 'c 'of Figure.-

aportion of a television receiving station organization.

l'l'ffigu're 5 is a composite front elevation view oflthe grid networkconductorportions of Fig-fures 3 and 4 showing the mean and supportingthe conductor po iii."

to each other;`

vFigure 6 is an end elevation View showingthe method of alternatelyassemblnathe diierent network grid portions of Figures and 4' and alsothe means for spacing and insulaiingthe y saidalternate grids from eachother.

.Figure '111s' a tori view 'off the .netwerk 'grid portions whenassembled alternatelyr as Figure the circuit organization 'means Aforyconnecjtingk the flux producing conductor portions cithe as`-`- sembledgrid portions o'f Figures 3 to' 7 inclusive.

' .dicated bythearrows.,` l l. I

'.,Figure "ll is a diagrammatic' presentation. of

"the ow of flux producingcurrents rieure. 9 is a schematic diagram .0fe' mit@ f thefconductor networlrgrids @Figures v3 Vand 4 showing thecurrent reversing action in certain gridy portionsasindicatedbytliearrows.' y y Figure l0 is aldiagrammaticpre tation citionsof theconductorknetworl o f'ligure f3 'as lnth'e passage ofmagnetio. uX. produ gcurrent in lthe conductor portions of the/networlr'grid orf" Figure 4 as muicatedby the-arrows:

. Figure 12v is a vdiagrammaticv 'presentation` ofV the composite cow ofcurrent in the@ flux .pre-

Isection of. the horizontal conductor .portionsoi lso .magneto-optics.v

'rotatie Y portions ofthe said light.` 'i

' ytion as indicated'by the arrows. y ,l Figure 14 is averticalusecticnalview .,istic image and Aaccepted in the art.

duing conductor networkgrids of rfigures 3 and asi'ridicated by thearrows."

. Figure 13 isa portion of the sectional yievyof a Figure Staken alongthe lline BLB inthe *'diregc.-A

.portions similar to ligureilwiththe magnetic show the progressive.sequential` magnetic fluir combining and'neutralizing actionv resultingf i the current reversing action "shown in Eigure" `f of superimposingthe subjectmatter characterT affected' currenty A,in relative phaseonelv Figures 15l and 16 indicategraphically the eieot.

po"siticu` on the network k'se''annin'g current.

Them'agnetic rotation of plane pola `zatig`onr-cifv` light isy wellknown andacceptedfin. art-lof The theory @if the:

- It 's also accepted in he art that electric field polarization whichacts to .prevent usefullL de-k composition and reassemblyr of image'subj'ectf matter-rr characteristics modulatingl elementary The .presentdisclosure contemplates the ,em-I. ployment of single scanning currentvdirected l o througha recurrent mesh' network of two groups 75 f ofgrid conductor portions arranged vso as' to conb H Alovvfof.currentthrougliref:' Current conductornetworks also welldnown'page 'prefieren of lights 'panied by elliptical rotation ofthefsaid'plane `,duct current to createA elementary portionsy ofmagnetic flux progressively and sequentially re versed during a singlealternation ofthe scem-` ning current and comloimzd a function of theyclriaracteristics ol` saidfiinpressed'scanning current.` The reversal ofpolarity of a magnetic iield is normally accompanied by absence'of anyeld f during such reversal', out in the present disclosure .two adjacentelds (one from each group) are aliifa'ys''ssooiatedin a dielectric ilu'path in' addi-v tion-or opposition oecau'se ci said. reversal.

Whenthe said magnetic fields are equal and inv oppositiomit is obviousthat the said magnetic is, and thus the plane polarizaw verlaat Vpassingthrough ak dielectric in thiscommon path ields willbe neutralized intheeominonportions tion of elementary portions of a oeamo lightwill berotated out of the original plane poiarization ywhen `the magneticfields in addition-and* Will notbe rotated out ,of the said originalplane when the said magnetic fields are neutralized.- in' the Saidportion of the flux path thus 'to oe come .liined' injother adjacent'portions of the paths.'

Thus the present disclosure is Eliased on the novelty. of providing`conductor networkv means for' producing two elementary elds in a commondielectric iiux'path and varying the vfields relative tofeach'other'sothatthey change from estate of addition in the said paths to state ofoppo-vl sition orf neutralization one after the otlienf' If planeDOlrized light is passedfalong thisL path; j its' plane -will berotatedby tl'ie'additive rrleld veff'ect'` and this plane vpolarizaticu'ifit-ill return to the normal plane polarization as the'iields yap-`proach-k `the neutralized state If,` a plurality ofelementai'yyportionso1r plane polarized `light are thusly associatedwithr a plu-l rality of elementary magnetic fields produced `byimigio'sirig a'singl scanning corrent on hoththe groups of conductorlportions olla mesh gi'idgnetq Work, `it is obvious that magnetic iiuXvand li it flux may be so associated that a progressivecur-`rent'reversingaction and thus an associated mag.H

l netic"field opposing, adding or neutralizing action will be providedto' progressively and sequentially permit the rotated planepolarizations of lthe said `ele'ngientary light portions tosediientially return ksame to the` normal plane polarisation;

y.'Il'ie present disclosure also contemplat es production oftheelementary mrtions of network .grid magnetic flux with aerninimum ofelectr-ic potentialbetween adjacent iux producing? vgrid conductorportions, and thereby' with a minimum of accompanying elliptical planerotation ofthe associated plane polarized elenientary'lig-ht por--.. n

tions passing along a dielectric flux path between lthe saidk networkgridconductor portions.

v13g.eferring to Figurel there is shown a beam'of light lili o fproper'ntensity. vA previously exposed and developed record aieotcd ilmlil hereinafter the y referred to as-tlie image to ce transmitted ,is

placed in the path` of the beam HS and the film l1 isrnovable in aconventional. manner relative to thesaid beam 'by means of thesupporting stor- Aaglerollers i8 and I 9 so as to properlyirnage effectthe loeani H6 to providel an image affected beam of' nght 2u.

A iight. decomposing Circuit' elementaire s, is' Vprovidedwithwater-,tight transparent opposite sides.. one` side includingv aconventional light polarized lightv plane polarized hy the nlmv 22.

The said polarizing and analyzingilms are plal'sed` vpolarizing film Z2,such as Polaroid theV 1 opposite side provided with a light analyzingfilml 23;, such as Polaroid positioned so as to analyze 31, 3B, lll andi3 grids willv have yhorizontal con-: l 55.

in the path oi the light beam l IE and the image record affected beamrZsothat analyzedlight portions y24 may pass through the 'rectangular meshvopenings of the said network grid conductors when assembled as shown inFigure 5and thence intercepted as hereinbefore `described by theconventional light sensitive circuit element 25 connected to aconventional television transrnitby means .0f i

tingcircuit organization (not shown) the leads 26 and 21.

In Figure 2 there is shown a beam of light 28.:

A combined light valve and reassembling cell 251 l.

similar tothe cell 2l of Figure 1j isV placedinthe path ofthe beam 28 sothat the said light beam may pass `through the said cellk and thusthrough` the plane polarizing lm 3G and the analyzing` film 3|. Theimage affected analyzed light "porn tions 32 and these analyzed lightportions may be collectively `and usefully Viewed by the light sen--`sitive element 33 indicated in Figure 2 as a human eye l i f y l; i. InFigure 3 there is shown one of the A l'network grid portions preferablyformedfrom af* sheet of current conducting material such 'ascopV-n per,aluminum or'silver or wire of the same Ina-- terial woven in screen orgrid form' and having main vertical` grid conductor portions dni-'to 53and horizontal conductor portions 64 to 69 in,-

except .that the horizontal conductor portions lll n to 14 inclusive arehorizontally positioned so "a's to be'midway between the horizontal.grid portions `El! to 69 when ther network grid of Figure 3' is placedon 'the assembling pins neigt to thefnetwork grid of Figure 4 asshownfiri' Ifiguijef5-. This alternate horizontal spacing andpositioningr of the Isaid horizontal A and B grid conductor portions isclearly shown in Figure when the network grids A and B are alternatelyas sembled v 4on the lining up pins 'i5 to 'I8 inclusive. This"alternate assembly of network conductor grids "56 A and B may be seenfromthe side by reference.

to Figure 6.; A plurality of insulating spacers 13.5;

' and i3l vare also shown inFigure 6.l Thus they network grids 34, 36,3% and all and 42 willbel similar to the A grids oi Figure 3, while theJductor portions similarto the B grids of lif'gur'e In this event thealternate `grid squares forni d.l

by the composite end View `(see Figure 3) offtne` combined conductorportionsof the A andB` grids will constitute twice as many .rectangul'arux paths for any magneticlelds' createdlbyf currents owing in the said.-conductor portionsy as there are openings in'the grid form of Fig.; 3Q.especiallywhen the grid network `oi Figure 5f is submerged in adielectric material. 23-C contained in the cells 2l and ESof Figure land Fig-` l ure 2.

Figure? Yshows the ltop end `terminals .of the vertical grid conductorportions .4E-511 vand.

SLi- G3 of the A and B grids of Figures. and 4Q' when alternatelyassembled and spaced asws'hown in Figures 5 and 6.

All of Athese vertical conductorxportion termi-1 v nals of Figure 7 willbe duplicatedA oifcourslewinl a similar bottom View. n j The presentdisclosure therefore is" alsov based' on vthe :use 'of a varyingyr'alternating 'scanning current-toprovide'alarge-.number of grid con-yductorzlcurrentfreversals vin the individual horizontal gridrconducti'ngportions of thesaid net-l work during the interval of afsingle:scanning`current Variation `or alternation.I If an alter-` nating current is used`for networkscanning power, 'theser alternating scanning currentreversalstwill becprogressive andsequential `in the saidscreen-grid"conductor' portions for each alternation of thefsaid'scanning' current. If the alternations are periodically repeated as ina commercial 60' cycle power current, the said'curl'ent l reversals-willbe synchronously' effected according to the characteristics of the saidpower current. t l A "fields 4created by these horizontal network gridconductor current reversals will also be synchro- 'noulsly reversed infthe dielectric flux pathsin the l same progressive and sequentialrmanner that' versed.

erence toFigure 9. `If the positive potential lead lS--A and thenegative lead Sli-A of Figure 9 are connected tothe* vsource'fofconstant potentiallcurrentand `the oppositeleads M-A and 83-A areconnected toa 'circuit leleiru'ent having no potential,the currentfromthe lpositive lead 19-A will iiow in the direction-indicated by thearrow and dividey in the re-'current sectionsv 64 to 6d to flow downwardin accordance with the accepted llawoiy current flow Kin networks.` Now,

if the positive lead de-A andthe negative lead M -A are connected to thesaidsource of constant potential current` and thev leads 'M -A and lill-A are" c onnected to av circuit kelement normally ofno potential,y thecurrents from thepositive lead S33-A will' divide in the rie-currentsections 64 to 69 to-flow upward in accordance with the saidlaw yoi flowof currentsinnetworks, See 'Engineersf H'anciloookv (Electrical? ,A`third edition (Fender,v McIlwain), pages 3+-02 to 3- 19.

tial ojr the scanning current source connected to the network Aconductorleads l-Aand -A is equal electrically'to the scanning current sourceconnected to theleads Ell-A and it-A, and that the grid conductornetworkincluding the conductor. grid yportions 64 to 69 inclusiveissymmetrical"physically` and electricallyV to the saidv sources. Byreferringto Figurej, it will be seen that these yfeeders` are connectedto the same sourceftlirough the leads 8h82, 85 vand 85 "in inductiverelation `with the scanning `current source leadsv lli'lQ-'ll and, HZ-lI3 by means of the windings lll4,' lll5, |69; H0, li and lll. The

leads lill, ll, `ligand l i3 are connected tothe same source aslljierein'after "explained soy that the scanning current will `be.impressed non the two grids groups in relative phase opposition. Thus4the flux producing current flowingin the grid portions 54 toli will bevflowingopposite in relative directionto the 'current flowing inthe gridleads 'leads s a-A and at -ais increasedreiativem the potentialimpressedon the feeders T9-"A and' all-Athen the current flowing in thelead'portion 65 will of coursedecrease in accordance with the acceptedlaws of networks as `stated in Sec:`

tion `2, Paragraph 1880i Standard Handbook 'This current and associatedmagnetic reversing' action will be more clearly understood byref-J rtffollows uien 'that the resuming magnetic" the said individualconduotorcurrents' are re- 'los for ElectricalEngineers, to approacha 1ero-valueland thence increase in strength 'inthe relatively opposite direction asthe potential of .the -current supplied to the leads 83--A and 8f4-A isfurther increased (see Fig. 9).

Now let it be assumed that the potential of the current source connectedto the leads 'IS--Al and 80-A gradually decreases to zerostrength andthat the potential of the current source conf nected to the leads 83--Aand 84-A continues to similarly increase. Eventually all the currents inthe grid conductor leads (shown as vertical in Figure 9 only beoauseofthe position ,of `the drawing) 64 to `69 inclusive will be reversed oneafter the other and the reversed currents `will then all flo-Wrelatively upward as referred to Figure 9. If the potential-oi the lefthand source ing currents in the portions 64 to 69 inclusive will now beflowing relatively downward with refer# ence to the sheet uponwhichFigure 9 isplaced.

All 'of these progressive andr sequential current reversalsof Figure 9will occur in definite time relatio-n to the potential change of thesaid current sources. I

If a regular alternating current potential is applied tothe said currentsources 83-A' andv BliwA and lf-Aland til-A so that thepotential of onecurrent source is at a maximum as the other current source vpotential isat a minimum, then the said grid conductor current reversals in the Agrid portions 64 to 69 of Fig.,10 inclusive will in eiect collectivelyconstitute a moving current reversing action, moving across the grid.opening of` Figure 5 periodically repeated according to thecharacteristics of the said alternating scanning current. Theresultant-.magnetic ilux field changes created by these scanning currentreversals will also collectively constitute'a moving field reversingvaction moving across the yopening of the grid in synchro-nism with thesaid current reversals. y

yIl? a grid network ofcurrent conducting por?` tions as shown in Figures3 to 7 inclusive is arranged to alternately include a plurality of the A(Fig. 3) and B (Fig. 4) grid portions assembled 'as shown in- Figures 3and 4 and'9 then a plurality` of movingof current reversalaction and theresulting action of magnetic flux reversalsfin effect will be obtained.lThe main .scanning network maybe formed with many grid conductorportions in parallel relation as shown in Figure 9, or 'these gridconductor portions may be formed in a series-parallel grid eachincludingaplurality `of conductors as shown in Figures 3 and tl, and

as manyv A and Bv grid portions as necessary. may n beused. `Whileeither work may be employed, the series-parallel arrangement and.operation will 'be explained for the purpose of this description.

In Figure l0 there are shown only vertical grid conductor portions 46.,41j, 48 and 49 of the network grid of Figure 3 hereinbefore designatedas the Agrids. All of .the vertical grid portions are `assumed to .be-electricallyry symmetrical to the current sources-.connected l,to

the leads `'l'Q--A and ll-Afand 4also the leads 83Q--Aand 34a-A, and the.potential of( the saidv current sources are at first assumed to beequal.

Thus .an 'equipotential reg-ion kwill .exist in the methodof forming thegrid net.

four lof the .work.- In the composite vnetwork of Figure l0 it will l*vnormally be `found in the horizontal train 'of' horizontal `networkgrid; conductors y of Figures. 3 and 10 inthe samemanner that anequipotential region existsbetween, portions y66 and @lof the networkportions of Figure 9, and equipotential points inthe vertical gridconductors will move alongwith this equipotential grid region inacfcordancewith the theory of networks as known and accepted in the art.

p Now the leads 'IS- A,

v en -A, isz-Bahasa 'n of 'Figures l0 and 11 are assumed to be connectedto the saine current source BA 'as shown in p i3d-B in the same mannerare connected to :the

samesource. The leads H8, I IS, |26 and|2l are connected to the positivepole lead 93 ofthe conf stant current source BA, and the leads |2ll,|2|,

|28 and |29 .are connected to the negative pole lead 92. Normally equalconstant currents ,Will

' ow through all theseleads. The varying current source C is connectedto the leads ll-A and H11-A and to' the leads |01 and H3 connected v tothe primary windings V|06 and Thus the varying current Will besuperposed on, the leadsv 3|. and 86 in anon-posits' direction to itssuperposed flow in leads 82 and 85. In this event these j componentcurrents will be inductively neutral to' the image current circuitincluding the leads .Si

Aand |82 connected to the image currentsour'ce' I connected tothe'inputleads 9|-A and `'m2- A'. Thus any change in the potential of thescanningin'g portions as shown .by thev arrows of Figures 10 andll. Thus if'thesources of scanning cur-- V*rent are all equal and constantptwostationary equipotential network regions will exist, oneY in each A gridnetwork and one in eachB grid net# work.;` n y n n These equipotentialregions will also exist in the same'relative position in all the otherAand B grids alternately assembled to constitutethe said `scanningnetwork. The A set of 'equipotem Figure land also light beam v28passing'through Y cell 29 of Figure 2. The equipotentialI portions ofthe B grids `will in like manner also be in line in the path of the saidbeams.- Also-it should be .noted that the said equipotential portionsofthe B grids will not/be inthe path of the same elementary horizontalportions of'plane polarized light. as the Yhorizontal equipotential linevof parallel lines of equipotential regions will be rela.-

cause the A and B grids are slightly out of Vsymrmetry electrically'with respect to the current source as hereinafter stated.

Av composite section of the said equipotential regions when the saidimpressions are equal will normally be inthe center electrically ofthonetsquares formed by the alternate ygrid conductor portions B6, 41,6l and 48.

This situation` ymay be explainedy as follows. In Figure l1 there areshown four of the vertical leads ss; 51, 5s and 59 of the grid newmrkkof Figure/.4. The conductor portions are all elec- :sel .regions of theAgrids, but the two horizontal 6.0,

versals may be very high` the change of .currentV inany individual gridconductor portion will be comparatively Islow or in synchronism with thetrically and collectively symmetrical-*to `the scanning' current sourcein the same manner as shown for the grid of Figure 10 but the resistance.value ofthe lead of the horizontal conductor portion 10- of Figure ilto vthe source of the scanning current is not the same as the resistancevalue of the lead 64 of Figure 10 tothe said source;

Because `of this diierence in resistance values of the leads theequipotential region oftheB grid of Figure l1 will not coincide with theequipoten-` tial region of the A grid of FigurelO when they arealternately assembled as shown in Figure G', and the current in ahorizontal-'conductor portion of a grid of one of the groups will flowopposite magnetically to the current flow in lan adjacent conductorportion of one of the grids ofthe other group as shown in Figure 12 andon the supports 'lland 1l. l 1` f. Now let it be assumed that 'thisequipotential regional displacement is such that current reversals (seeFigure 9) occur rst in the A grids and then in the B grids. Then thesaidicurrent reversals would rapidly occur `in an alternate manner iirstin an Al grid and then in a B grid when a varying potential is appliedto the network as hereinbefore described; -1

Ii the potential of the left hand source 'is now increasing (see Figures10 and-l1)4 and the right hand source of potential is equally decreasingthese grid conductor current reversals willoccur alternately in theadjacent horizontal portions grids oiliigures l0 and 1l as shown inFigure 12.. lThe current in horizontal portion 66 ofthe the grid ofFigure 1() has just been reversed-.and thus the grid conductorcurrent'in the portions 65 andlZ of the A and B grids are now 4flowingin the same relative direction. 'Y l With continued variation (asdescribedinthe preceding paragraph) of the impressedl potential thecurrent of horizontal grid conductor portion 12 of Figure 11 .will nextreverse and thence the scanning current of portions v'l2 and 6T'will beflowing inthe same direction, but opposite relatively to the directionthe currents 'of portions 665 and l2 'were just previously flowing.`...With still further potential variation the scanning vcurrent inportion 57 will reverse and the currentszof portions'Sl and 'f3 willilow in the same direction but relatively reversed to the direction f offlow of currents just previously existingxin the same direction in gridportions 12' and' (il.l This action 4will be progressive from oneconductor to the next as shown in Figure 9. `Duringa given alternationall the currents jin the horizontal portions of all the two groups ofgrids will be reversed one after the other in horizontal groups in aprogressive and sequential manner, and dure' ing this reversing actioneach current ina hori zontal A grid group will low'i'n the samedirection as an adjacent current in a horizontal-B Y grid group for aninstant of time. v v 'Ihe frequency or number of these A and .B groupcurrent reversals for a given scanningacurrent alternation will dependon the number ofl horizontal conductor portions in the grids and therate of potential changev of thescanning .cur-

rent. l It is obviousthat a large number of current reversals may beobtained duringa singley scanning current alternation, and that thisnumbery l the conductor network grids.`

scanning current.

The magnetic eld iiuir produced by the net-7` eld in the commondielectric flux paths between 115,5v

the said' grid `portions as shown in Figures 13 and i4. These individualgridmagnetic iields lwill have the relatively low frequency of the saidscanning currents without -regard to the progressively elementaryiieldreversingfrequency. A 20 The dots of lFigures 13 andll representingthe verticalieederszof the A and B gridsactually will be slightlystaggered andnotinwline as'.

' shown. In this event the elementary lightpo-rtionA 24 ofthe-light beamyl 16 or 2i) of Figure 1 will not be plane rotated magneticallywhe111passv ing throughkthe lux neutralized.dielectric iiux pathbetweenfthe` conductorportions and l2, lll-and 48, 5l and y58fofFigureslO, 11, 12 and 14 as shown in Figure 14 (assuming that thepotentialof the scanning current is constantLfor this particular.instant) This istrue because there is `no magnetic flux` in the saidlight path.. The magneticflux from the two grid'currents-lowingin the`same direction in parallel adjacent Lgrid conductors has combined vinother portions ofv their flux paths, v:but

se 2l at the instant'the saidI currents areequal no plane polarizationrotating magnetic flux ispresent` in the common `dielectric( viiux .paththrough which the said elementary portion of plane po-f larized lightMis passing asI shown in Figure 14.

.f It the network scanning current applied to the networkgrid'zconductors is now changed or variedas stated sol asl to cause arelativelydownward current. reversing laction (see 'Figure 12) then themagnetic fields of` the two groups of A and-B `networks will next beprogressively neutralized as shown 4in Figure.l 1,3v and the elemen- 1tary portion of planepolarized light 24 passing in the common*rectangular dielectric path bevvtween the conductor portions 12 and 6l,4l andr 48, and'l` and will not be plane rotated magnetically becausenorotating ieldiiux is present in the path oflthe lightportion 24 ofFigure 13 otFigurelll is the combined flux created by the currentflowing in .-thell grid conductor. portions of 4ligurelO'and the currentiiowing in the 'l2I conductor portions of the gridvof Figure 11. vIn thesame'manner,K the magneticn iiux shown by .the closed loopf'SG'foigFigure 13 is the combined magnetic flux-produced by the ,current flowingthroughA the Gl conductor portions and the conductor portion. The arrowsshow that the com--l bined flux 99 is: relatively opposite to the com-`All of' the magnetic iields as 94,85 and 91 of Figure13ar'1d98, .|00and 10| vof Figurepli'graduallyl increase and decrease according tothecharacteristics 'of the scanning current applied vto the currentfandeldreversing region are'increas-` f Thus the gridr current eldsrelatively behind ing and the grid conductor currents and associatedmagnetic flux fields in the path of the said reversing action areVdecreasing as` considered in Figures 13 'and 14.

Thus according to the present disclosure, I

y'provide means for alternately combining the flux i-lelds in anextremely rapid manner inside and outside' the common dielectric fluxpaths.

The numbero-f the A and B `grids of Figures 3 and 4 that maybefusedislarge. Thus, while the current carryingy capacity of the gridconductors is 'limited by the cross-section, it is obvious that thelength of the rectangular dielectric flux path'formed by combining allthe elevmentary flux paths in the path of an elementary portion of thesaid light isunlimited.

The lengthv of the dielectric plane rotating flux path will bedetermined by the number of A and B grids assembled in line as shown byFigure S.

l Thus thenumber of grid conductors and thereby sov d light'mayloe-obtained. This is true, since therey paths.

A and B gridconductor portions may be' used and the lengthofthe'dielectric flux path prof f the flux required in groups toproducethe planel rotating iields asshown vby Figures 13 and 14 is"notlim-itedand' the Ai and B grids may be al;l

ternately assembled as shownin Figures 6y and '7 to increase the commonrectangular flux path in the dielectric to the desired length so asA tosecure the desired angular universal plane rotation of 'all theelementary plane` polarized light' portions except the analyzed`portion.

It is an accepted fact that'the magnetic plane rotation of light`is`proportional to the strength' of the flux and `the length of the.dielectric flux path. The magnetic nux in the paths on either sidefofthe neutralized flux path is increased by such neutralizing action. Notelines 98 and 99, and It@ and mi vof Figure 111. The flux will beneutralized for `any intensity, but the greater f the intensity, thegreater the intensity of the' flux in the pathsadjacent the saidneutralized path.

Thusthe present device provides a scanning de-` vice by means of which asharp spot of analysed is nor rotative effect in the neutralized flux`path and a denite rotative eiectin the Vadjacent Furthermore,v any'reasonable number of portionally increased. The magnetic ux created inall these conductor portionsare added in their rotative effect intheportions adjacent the said neutralized portion. If 100 gridslare used,then two groups of 50 conductors portions each 'will outline therectangular neutralized path.' The magnetic flux created by currentcarried by these groups ofv successive conductors will be added in theadjacent flux-paths, and no iiux will 'exist in the said neutralizedpath. Thus no plane'rotation will occur in the said neutralized path,y

and a comparatively great rotation will occur. in the said adjacentpaths. It should benoted that the analyser will pass only light with theoriginal plane polarization. The only elementaryportion of thedielectric without magneticflux (at any time) is the said neutralizedAportion. Thus according to the present disclosure, `I provide a`scanning device which produces a sharper spot of scanning light thanhasbeen possible'with anyv device as now known in the art. In' the'known devices as the potential on the Kerrcells decreases adecreasingamount of light `willpa'ss through the analyser. -In the present devicethere yisvno decrease of potential .on the'cell'asia unit, because theconstant current. increasesas the varying current decreases. Thevariation of the scanning current potential does not vaffect the. amountof lig-ht passed by the cell.- ,it only moves the spot of light alongits scanning path as hereinbefore described. f

It will be obvious that with avv change in strength-of th'e networkscanning current impressed onthe network of all the magnetic eldscreatedfin the dielectric flux paths are ,varying inrintensity, and thatat least one group of fields is always either at, near or just by itsreversing period.

Thus4 i't-will befunderstood that all adjacent Vgroups of.1horizonta1fluxy fields asy shown in Figs. 13` and 111` progressively arrive atequal flux intensities in .al sequential manner so as to comrbine'landform the flux .eldsas shown as loop 9,6

of Figure l3,and 99 of Figure lll. In this event,

Yno `plane polarization rotating magnetic flux will exist kin theldielectric flux paths of light portionsv 2d ofxFigures 13 andv 14.` Atthe same time,.this combining action will increase the magnetic fluxdensity of the adjacent light flux paths.` .becausethe magnetic flux ofloops and 96 and -96.- and 91; ofy Figure 13 combine in a common path torotate the planepolarization of the elementary portions of lightadjacent to portion 24,

andv thus sharp and clearly defined analyzation of subject mattercharacteristics is providedaccording to the presentdisclosure.-

,No current reversals will occur in the vertical grid conductor portions(see Figure 9) .and the magnetic flux produced will alternate inrelative direction from gridv to grid so that all the elementaryrotations.` of plane polarization by the elds produced bythe scanningcurrents of the .vertical conductors of the A grids of Figure 10will.:b`e equalled and in effect neutralized by opposite plane rotationof the plane polarization by the elds produced by the currents flowingin the vertical portions of the B grids of Figure 1l.

In the normalvoperation of the scanning network, it is contemplated toassemble .the A and y 'afford-circulation of the dielectric between thespaces between horizontal conductors, and with proper design ofthejcells 2l and 29 a continual circulation of the dielectric maybeprovided f through the said network to'thus conduct heat and equalizeallportions of the network groups. l During the interval of magnetic eldaddition or combining action yas showngby the combination flux fieldloops 96 and 99 of Figures 13 vand llthefelementary' portions 24 ofplane polarized light passing through'the rectangular openingscollectively formed by the gridr conductor portionswill not be plane.rotated and willthus be able topass through the light analyzing nlm 23of Figure 1 and 3l of Figure 2 with the original plane polarization. Thelms 23 and 3i are as` y Sumed to be set to` analyze plane polarizedvlight in its normal or original polarizing plane of the `polarizinglms22 and 30'of Figures- 1 andr 2.

ter characteristic current tothe network grids When the impressedscanning currenty isv of proper wave form and frequency the gridconductor field current and iield` neutralizing action and thus the saidsequential and progressive analyzing action of the reversing andneutralizing elds will collectively appear visibly in y the analyzedelementary portions of light in effect as a moving portion of light. Theanalyzed light l will move :along a pre-determined path` in `atransverse manner periodically repeated according to the characteristicsof the said network scanning current and in synchronism with itsalternations. i

` nlm il is positioned in the path of the beam- When the proper scanningcurrent is employed, the light beam H6 (or the image beam 20) of Figure1 will be progressively decomposed into elementary normal planepolarized portions 24 of Figuresl, 13 and 14 by the` sequential analyzafp tion of the light analyzing lm 23 and then inf tercepted bythe lightsensitive circuit element 25 forming a portion of a televisiontransmitting system (not shown). l

If the vpreviously exposed and developed record (either before or afteranalyzation) I I6 asshown in Figure 1, these elementary plane polarizedportions 24 will thus be image characteristic affected light portionsand the corresponding electric currents produced by the known action ofthese analysed image modulated elementary light portions 24 on the lightsensitive element 25 will also be image modulated electric currents andmay be transferred to an external circuit by the leads 26 and 2. i II"the image film l1 is properly moved on th rollers I8 and i9 forming aportion of a conventional motionpicture device (not shown) insynchronism with the alternations of the network scanning currentimpressed'on the network A and B grid conductors, then a series oftrains of image aiectecl electric currents will be producedin thetransmitting circuit 'system ofwhich the light sensitive element 25 is aportion.

It is of course. obvious that the image to be transmitted kmay bedirectly scanned by placing theV said image inthe path of the beam Il'b`so that the reiiected image affected elementary portions of the beamHrwill pass through the cell 2l as beam 20. f

Thus, according to thevpresent disclosure, I`

provide means for magnetically and progressively decomposing a beam ofimage modulated plane polarized light into `a plurality of elementarynormal plane "polarized portions, and thence transferring these imageaiiected portions o f light into corresponding electric currents.

Only one scanning current of comparatively low ments of Figure 2 are aportion as hereinbefore stated. Y

After the transmitted image modulated subject matter currents areobtained from the receiving station circuit organization (not shown)they are delivered to the network grids of the combined light valve andreassembling cell 29 of Figure 2.

A method of connecting the sources of the scane. ning current and thesources of the subject matof cell 29v (and 2|) isL shown in Figure 8;This circuit applied to the network of cell 2l of Figure 1 except thatnormally there would be no subject matter characteristic currentemployed in the decomposition of a beam of light as I I6 into elementaryportions such as 24.

According to the present disclosure,l the scanning current may beappliedto the network grids in any suitable manner so long asit acts toprogressively reverse all the individual lcurrents in the .A and Bvgroups of-horizontal conductor portions `in a sequential'manneraccording to' the characteristics of the said scanning current.

' lFor theA purpose of this description, let yitv first be assumed thata constant potential source of current is connected to the leads 92 and93 of Figure 8.l Thus constant current willequally vdivide at thejunction ofthe leads 82 and 85 to equally flow through the gridsupplyleads 'IS-A, 'l-B, 8.3,'-A,and' 83-B as indicated by the arrows ofFigures 8,10, 11 and 12 and after flowing through the A and B gridconductor portions will reinlrn by way of the leads all-A, Bil-B, 84-Aand 84-B-'to again united at the junction of the leads 8| and'BS tothence return to `the source through the lead 92 If the scanning gridnetwork issymmetricalV physically and electrically the resulting regionof f l equipotential will then be positioned in the electrically centralrectangular light path opening (see portions 66 and 6,1 of Figure 9). i,All otherrectangular lightpath openings iilled `with the said dielectricmaterial 23-C will'con- ,stitute common magnetic flux paths containingrable it to pass the normal plane analysing yiilm 3l v of Figure 2 (orfilm 23 of Figure l) This single analyzed elementary portion of lightwith normal plane polarization is indicated by the parallel dotted linesin the lili,V 12, 41, 48 and the 66, l2, 5 1, 58-fcompositesquare ofFigure-12.

In normal operation, a stationary portion of analyzed light will bevisible when only the constant potential current alone is impressed onthe alternate A and'B grids of the network, and this spot or point oflight will be stationary within limits with variation of the potentialof the constant current source because of the similar variau tions inall the network conductor portions.

This is true because there is no magnetic flux in the said analyzedelementary light portio-npath' as hereinbefore described. Any variationof constant current potential'would merely change all the currents-inthe grid conductor portions tothe same extent and thus would merelyrotate the plane polarization of the elementary light portions to thevsame extent, but the position of the'` point otanalyzed light will notchange. If the potential of the said constant` currentsource de` creasedto zero value the neutral area would gradually increase the lightportions would eventually be analyzed from all the rectangularv openingsbecause there would be no rotating magn'et'ic flux remaining.

'The normal-network scanning action of the ,y image to be transmittedmay be considered for the purpose of this description as starting withlprimary inductive windings lai i and tire. io-'thereby induce a similarscanning currentjin'the seci ondaryV windings Bile, He, idd and H15;` v

In this event the linduced scanning current will oppose the constantcurrent. in the leads S2 and 86 and add to-the constant current initheleads 8| and 85, and a component currentreversing action will start inthe horizontal grid conductor portions as described for the means ofFigures 9,v 12, 13 and 1li.v Elementary portions ofthe rimage modulatedlight beam' Mi of Figure 1 will thereby be progressively analyzed bythenlm 3| with normal plane polarization in a sequential manner tocollectively appear visibly as'a vmoving spot of light movingtransversely with twolmodes of motion to the (say) lower rightrectangular flux path of Figure 5 as the said-scanning current reaches amaximum positive valuev and thence returning along the same zig-zag pathto the said central symmetrical position as the alternation of scanningcurrent decreases to a lzero value. As the following negativealternation of the said scanning follows to increase to a-maximum in theopposite direction the moving point will-continue along its path to theupper left rectangular flux path of Figure 5 to return tothe saidcentral position of Fig. 12 as the negative scanning alter- Y nationdecreases to a zero value, r

Thus all the elementary portions-of the image aiTected beam 2|) ofFigure 1 vpassing along the lrectangular flux paths formed by the1network grid conductorswill be lanalyzedfor a given cycle ofthealternating scanning current. f

It should be noted at this time that the method of superimposing thealternating `scanning cur hereinbefore lassumed for the purpose of thisdescription. f

The method of transmitting the lsubject matter characteristic currentsto the `|`receiving station has been hereinbefore described andfitshould now suice to state that if the imageiof the nlm l Il of Figure 1is changed in synchronism with the n subject matter current will aid thesaid scanning alternations of the scanning currentsv supplied to thecells 2| and 29 trains of subject mattercharacteristic current will beavailableso as to be n imposed on the network grids of the cell 29 inthe same relative manner.

According to the present disclosure, this imageY subject matter currentis amplified in any conventional manner and delivered tothe leads 9|,

|02, |03 and HM-A of Figure 8 preferable in a manner so as to ilowthrough the radio frequency transformer windings 88, 8l, wand Quand thusinduce similar current in the windings H, H5,v H6 and l Il wherebysubject matter current will" new in the leads uns, Us, maand manu alsoin the leads |26, |21, |28and |29'so that the induced image subjectmatter currentu /ill 'loe"y superimposed on the network scanning currentin relative phase opposition inthe conductor portions of the alternate Aand B grids. vThat is, the

current in (say) thegroup o'ffgrids, 36, 38 40 and 42' and will Opposethe said scanning currentl in the group of gridsss, si, 39, #uarides'.1` nur;v

y rent.

aragon;

ing'a gliven-,instantthe alternating scanning current will bedecreasedin lead iti-'A as it is correspondingly `increased in lead i'i-.B whenthe currents are owing as indicated by the arrows of FigureslS, 10 andl11.

The eiect of such' relative yincrease andvde crease of network scanningcurrent in alternate gridconductor portions will be to relatively slowupithe'current (and associated field flux) reversing action of thehorizontal fconductors'as' @it to ii'inclusive of ,Figure 10 as thecurrent reversing (and` associated.flux) action is acceierated in thehorizontal grid'conductor portions iii to lil inclusive of Figure 11.r l

:Whenfthe image subject matter ci'iaracteristic issuperimposed on' thesaid scanning current the flux neutralizing action'v/'ill' no longeroccur inrv magnetic field reversing action and'eld neutralization soasto causein effect a blinking action I of the moving spot of light(analyzed) in accordance with the combined characteristics of the'scanning current and the said subject matter current. other words themoving spot of light will be varied in intensity in accordance with thecharacteristics of the subject matter current as it moves'along itstransverse path in accordance with the characteristics of the saidscanning cur- When the image subject matter characteristic current isnot present or impressed on the v'network conductors of the cellvZ@ ofyFigure 2 the analyzed elementary vportions of the light beam 2S willprogressively appear in 'predetermined sequence in accordance with thecharacteristics of the scanning current as hereinafter described.

Whenthe said image subject matter current isv of Figure 2 willprogressively appear as analyzed beam 32 modulated by thesaid trainsofsubject matter characteristics of the image iiXed on the nlm of Figure2. In the event oi-a'succes'sion of images as hereinbefcre stated thebeam 3| will be modulated in accordance with the characteristics of thesaid images.

The effect of the opposing and aiding action of .the subject mattercharacteristics image current line |25, then the curve E22 willrepresent normalpotential yof the scanning current.V The subjectmattercurrents arerepr'esented by the `curves |23 and |24. y

If the subject matter current lh posed onr the scanning current tc aidthe same, the scanning current will be increased to follow the potentialline ld-B oiv Figure 16. Ii the .said scanning `current 'opposes thesaid subject matter current then the potential line oi thesaid scanningcurrent will be decreased to the'line |23-A of Figure 15.

t should be noted at this point, the blink-y ingeilect caused by thesubject matter current is superimis an image characteristic modulationci ythe Spot y oi analyzed light normally moving in' 'a uniform mannerwith two modes ci motion `in apatlil periodically repeated in accordancewith the c alyzed elementary portions oi polarizedvlight as beam 32 ofFigure 2 will be alternately modulated with trains of image acousticaction characteristics and trains of image visual actioncharacteristics.

No change in the cell 2| of Figure lorI cell 2,9 of Figure 2 will benecessary for the sequential transmission of trains of visual andacoustic action characteristics, and the said alternate trains ofrvisual and acoustic actionsmay be superim-` posed in alternate sequence(in the case of space transmission) on the same wave-length asshown anddescribed in my U: S. Patentapplication Serial No. 483,922 led September2,3, 193,0.v

These alternate trains of visual and acoustic action characteristicswill be received at the television receiving station of Figure 2 in thesame manner as for single continuous trains of visual or acousticactions as hereinbefore described, and without any change in the cell29. The analyzed beam 32 will however be alternately modulated withthese visual and acoustic characteristics and means for transferring theacoustic actions into sound waves will be required. Amethod is shown inmy U. S. Patent application Serial No. 483,922 filed September 23,193,@v Figure No. 3 of this application shows a sound reproducingelement `2153 connected to a light sensitive element 233 placed in thepath of the portion of the acoustic action modulations of the beam from`the film portion Sa: as the visual action modulated portionof the lightbeam is usefully viewed by the gure shown. In Figure 1 of this ysameapplication there is shown a method of recording the visual and acousticactions of images inv proper synchronism on the same lm. c n y It willbe understood that vkI` am fully aware that many conventional light andcurrent aiecting elements could have been added to the drawjing andincluded in the descriptionwithout departing from the spirit of theinvention. Therefore, while I have 4shown and described and have pointedout in the annexed claims, certain novel features of my invention, itwill be understood that Various omissions, substitutions and changes inthe form and details of .the device illustrated or in its operation` maybe made l ,by those skilled in the` art without departing from thespirit of the invention. 1 c

Having thus described my inventiomI claim: 1. In a light valve, a sourceof reference current, `a source of scanning current, a source of imageaction current, means comprising a plurality of parallel screen meshlnetworks, formed with parallel conductors arranged in turn to Iformsimilar square light openings alternately offset vertically and in linehorizontally for progressively separating plane polarized light-intoelementary portions as a function of the cooperative action vof twogroups ofv elementary magnetic elds positioned in succession inadielectric in the path of the said light, means providing the saidlight, means constituting the said dielectric, said separating meansincluding conductorsfor collectively conducting current for creating thesaid magnetic fields so that adjacent lines of successive fields lof thesaid two groups positioned in the path of the same elementary portion ofthe said light will be alternately reversed according to componentscanning current fromv two of the said sources, said reversalsoccurringin parallel transverse paths relative Ato the said light inaccordance with the combined characteristics of the reference andscanning currents, circuit means for yconducting the saidcomponentcurrent from the said sources, additional circuit means forconductingcurrent from another of the said sources forsuperposing imagecharacteristic elds on the groups of component scanning kfields therebyto diiferentially vary the intensity of the said elementary lightportions as they are sequentially` separated by the co-operativeactioniof the scanningelds according to the component characteristics ofthe said image field and the scanning field, meansfor analysing thelight portions, and Aimage screen means for viewing the said portions.

y2. In a television device, a source of constant current, a source ofvarying scanning current, a sourceV of image characteristic current,means providing a source of light,` means for polarizing saidlight,current conducting network means including alternately positioned groupsof recurrent sections `each with repeated common connecting portionsconnected to the source of constant current for conducting vcurrent fromsame for creating a plurality of identical groups of elementary magneticfields in` dielectric flux paths positioned in the pathloitheslaidlight, said flux y paths arranged 'in groups, each group approximatelyin line so as to be alternately offset vertically to the samelextentrelative'to the 'said light path, means constituting the saiddielectric, meansv for superposing current from the said scanningcurrent source on the said constant current :for collectively. "varyingthe said groups of elds so that the fields of one group will beindividually and progressively combined with an adjacent eld of anothergroup in one parallel path after another in timed relation to thescanning current'variations vin accordance with the characteristics ofth'e'resultant component currents in the said network, additionalcircuit `means for superposing a current from the said 'image currentsource on' component constantscanning ,current for additionallyaffecting the said eld combining action in accordance with thecharacteristics `of 'the component, constantscanning-image current,`said image current` superposed in'relative phase opposition'on thecurrents creating the adjacent' fields of the said groups, means foranalysing Athe light portions having original plane polarization aftertraversing the said iux pathsf'durng said combining action, and meansforiviewing the collective analysation of the saidelemehta'ry portionsof light.

3. In a device of the class described,` a source of constantlpotentialcurrent,` a source ci varying potential current,l a sourceof imagecharacteristic current, means constituting a universal light valve`circuitelementincluding a conductor network formed with two groups ofgrids each including a plurality of horizontal and vertical spacedapartrepeated magnetic eld producing portions, saidvertical portions inline Aand said horizontal portions alternately out of line relative to acommon axis,y a vcontainer with opposite vtransparent walls, polarizinglms on said'walls,

said container arranged for positioning. the said network within the.saidcontainen `a dielectric for surrounding said portions, meansproviding a beam of light and projecting same through the said fllms andValternately ybetween the said suc-` cessive offset horizontalgridcurrentconduct'ing field producing portions of each of the said groups,circuit means `for supplying constant current from one of the saidysources in relative opposition in adjacent group portions of the saidnetwork, circuit means for superposing an alternating current inrelative phaseL opposition on the said constant current'from a secondsource so as to cause the successive fields produced in the said offsetlines to reverse as a set one set after the other in parallel paths intimed relation to the variations of the said varying current, additionalcircuit means connected to the third source for superpcsing an imagecharacteristic current on the'component constant-alternating currents soas to oppose same in certainhorizontal portions of one'groupas it addsto the currents in similar symmetrical portions of the othergroupwherebythe elementary portions of the said light may be decomposedinaccordance with the combined characteristics of the three currents,means for analysing the decomposed light portions, and image screenmeans for intercepting the analysed'portions so aste Vcollectively viewthe same.

4. In a television receiver, two sources lof ycurrent including meansfor supplyingfconstant' potential current and varying potential current,means for producing a beam of light, means for plane polarizingthe saidlight, means constituting a conductor 'networkincluding two identicalparallel groups. of alternately spacedlapartrepeated parallel screengrid portions, said groups 'fected light.

oii'set in one"direction and line in another direction relative to thesaid beam so as to form two light paths, each path outlinedvertically byportions of both groups .and horizontally by portions-of onek ofthegroups so as to form light paths in the path ofthe'said light adielectric material for surrounding said network, circuit meansincluding means for connecting'the said network tothe said sources forsupplying component ux creating current to symmetrical conductingnetwork portions ofieachg'roup so 'that a resultant magnetic eldreversing action will occur rst Vin symmetricall horizontal portions ofone group and thence in adjacent symmetrical portions of thevother'group due to the 'variation of the said component current fromthe said sources whereby the resultant elds 'willcombine to cause theplane polarization of certain elementary portions of light to remain inlthe original plane polarization as the plane polarization'of otherlightsportions isr rotated saideld combining action in effectprogressively moving along one parallelpath after another in `timedrelation to the actionsof the said component current so that oneelementaryy portion of the light will remain innormal plane'polarization in accordancewithA such' timed relation, means foranalysing the said elementarylightv portions with original planepolarization, rimage meansin the path of the said analysed light, andimage s creen means :for usefully intercepting the yimage afvidingvariable potential current network means including grids of conductorsin screen mesh circuit relation to form similar screenA openingssaidscreen grids arranged in parallel relationvertically sothat the openingswill be` inA a staggered line relation horizontally for" conducting acurrent so as to progressively reverse the polarity artrosi rent from -aAfirst' ofthe said sources to -ilow l theelementary portions of the saidnetwork to thereby create two identical elementary groups of normallyconstant magnetic elds sequentially of diierent ypolarity andprogressively varying I intensity, dielectric means constitutingtransparent flux paths for each of the said fields, circuit means forsup'erposing arseoond current from a second of the sources on the iirstmentioned cur- I0 of the groups oi elds in a sequential manner one afterthey other so that a held-reversal `will occur rst in an elementary fluxpath associated with one group and thence in a symmetricallysimilarelementary flux path associated with the other group so as toprovide aprogressive eld reversal action along one parallel path afteranother in timed relation to the variations of the said varyingvcurrent, a source of light, 'means for plane polarizing the said light,means or positioning andsupporting the said network portions in thepathof the said light, means for analysing portions of the light, imagemeans in the path of the analysed light, light sensitive means for-intercepting the image affected light, and means for connecting thelight sensitive means to van external circuit. i

\ 6. In a device of the class described'a conductor network, a source ofscanning current, said network'inclu'ding two groups of identical spacedapart screen mesh portions iormedwith recurrent sections'with commonrepeated current conducting elements, circuit means for 1 separatelyconnecting each portion ci each group to the source of scanning current,said portions includ? ing current conducting elements arranged in re.-lated squarefshapedvcurr-ent conducting paths so that the said currentwillr reverse in an element of a square path `of one portion and thencein an lao element of af square path of the other portions to im cause acurrent reversing 'action along one parallel path afteranother, saidreversingaction occurring until the current in all the elements of bothgroups have been reversed.

-7. In'a device ofthe class described, a screen u conductor network, twoparallel sources of curk lsources of "current so that a componentcurrent ru" will ow invone direction and thence in the oppositedirectionfin one square path part of the meshl after the other to causea procession of current reversals in the common portions moving inefectinlparallel'paths indefinite time relation ilo tothecharacteristics of the said varying current in accordance ywith thecharacteristics oi vthe current from'the lsaid sources, and means iorpositioningand supporting the said network and said'connections so thatthe square paths of one group will be positioned out of vline 'with thesquare paths of theother said group.

8. In a device of the yclass described, a-'con- 'ductorfnetwork a sourceof constant current, a source of varying current, a beam oflight,meanse=, for `plane polarizing said light, said network includingtwo groups of parallel conducting screens io'rmin'g'. similarrectangular openings `alternately "disposed in slightly offset relationin the* path -of the same elementary portions of the said beam, 5,

each of said screens including recurrent sections with repeated commonconnecting portions in spaced apart parallel relation in the path of thesaid light, the connecting portions ofthe groups so related thatsuccessions of same lie in lines parallel to the said light a dielectricsurrounding the screens, circuit means for impressing a cornponentcurrent from the said sources inlike manner on the said groups so as tocause the currents carried by thecommon portions to reverse one afterthe other along parallel paths onel after the other in synchronism withthe characteristics of the said varying current, means for analysing thelight portions after transmission through the said. offset openingsbetween portions of the screens and thus the dielectric, means for imageHOWARD J MURRAY.

